fix: Add conditional check for existing sops-age secret in bootstrap task

[Deenyoro]

Add conditional check for existing sops-age secret in bootstrap task

[Deenyoro]

I know the main task file checks if sops is in the user directory, but I thought this change might help people that are defining their own Age key.

          if test -f ~/.config/sops/age/keys.txt; then
            echo WARNING: SOPS Age key found in home directory, this may cause conflicts.```
            

[onedr0p]

Overall I think this makes sense, I just want to get to my laptop to review it 🙂